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学者姓名：杨晓强
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Abstract ：
High-performance concrete-filled steel tube (CFST) members consisting of high-strength steel and ultra-high performance concrete (UHPC) are more and more widely applied in modern engineering structures. These structures/structural components may suffer from axial impact loading during its life cycle such as impact induced by the collapse of top-level floors. However, the design and evaluation methods for axial impact resistance remain unclear for these structures. This paper presented a systematic study on both the impact and post-impact resistances of high-performance CFST members subjected to axial impact. A database of CFST members subjected to axial impact was first compiled, and a finite element (FE) model was established and verified by the test results from the compiled database. The effects of key parameters on the impact resistances and residual capacity of square UHPC-filled high-strength steel tubes under axial impact were clarified. By employing 420 FE models of square CFST columns subjected to axial impact with random parameters, equations for predicting the maximum axial displacement under axial impact and axial residual bearing capacity after axial impact that are suitable for conventional and high-performance CFST columns (fy <= 960 MPa and fcu <= 200 MPa) were developed with reasonable accuracy. Finally, a maximum deformation limit was recommended for CFST components subjected to axial impact, which provides a reference for anti-impact design and evaluation for general high-performance CFST members.
Keyword ：
Axial impact resistance Axial impact resistance Concrete-filled steel tube Concrete-filled steel tube High-strength steel High-strength steel Prediction method Prediction method Residual capacity Residual capacity
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| GB/T 7714 | Yang, Xiaoqiang , Zhu, Liguo , Bi, Kaiming et al. Design and evaluation methods for CFST members with high-performance materials subjected to axial impact [J]. | ENGINEERING STRUCTURES , 2025 , 327 . |
| MLA | Yang, Xiaoqiang et al. "Design and evaluation methods for CFST members with high-performance materials subjected to axial impact" . | ENGINEERING STRUCTURES 327 (2025) . |
| APA | Yang, Xiaoqiang , Zhu, Liguo , Bi, Kaiming , Zhao, Hui , Zhu, Yong , Lai, Zhichao . Design and evaluation methods for CFST members with high-performance materials subjected to axial impact . | ENGINEERING STRUCTURES , 2025 , 327 . |
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Concrete filled steel tube (CFST) column is widely applied in shear frame structure in seismic-prone area owing to its superior earthquake resistant performance. However, CFST column might still suffer damage under a severe earthquake. This paper proposes a novel tuned-mass type column-in-column (CIC) system to improve the seismic behavior of the CFST column and hence protect the structure. The CIC system is formed by splitting the CFST column into a primary column and a secondary column, while the overall cross section area and hence the load- bearing capacity is not changed. By optimally selecting the springs and dashpots to interconnect the two columns, the CIC can act as a non-conventional tuned mass damper (TMD) to reduce seismic vibrations of structures. To demonstrate the proposed CIC concept, a single-story and a five-story frame structure with and without control are designed. Nonlinear time history analyses are performed to study the seismic responses of these structures considering different seismic design levels, earthquake ground motions and CIC control schemes. Numerical results show that the CIC system can effectively reduce the seismic induced story acceleration, displacement and drift ratio of frame structures with the reduction ratios approximately between 21 % and 30 %, and the ratios on reducing the base shear force and bending moment are between 27 % and 31 %, and between 34 % and 49 %, respectively. The proposed CIC control concept is a new solution for mitigations of seismic responses of CFST frame structures.
Keyword ：
CFST frame structure CFST frame structure Column-in-column Column-in-column FE modelling FE modelling Seismic response analysis Seismic response analysis Vibration control Vibration control
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| GB/T 7714 | Fang, Xiaojun , Hao, Hong , Bi, Kaiming et al. Seismic response control of shear frame structure using a novel tuned-mass type composite column [J]. | ENGINEERING STRUCTURES , 2025 , 322 . |
| MLA | Fang, Xiaojun et al. "Seismic response control of shear frame structure using a novel tuned-mass type composite column" . | ENGINEERING STRUCTURES 322 (2025) . |
| APA | Fang, Xiaojun , Hao, Hong , Bi, Kaiming , Ding, Hao , Yang, Xiaoqiang , Song, Jian et al. Seismic response control of shear frame structure using a novel tuned-mass type composite column . | ENGINEERING STRUCTURES , 2025 , 322 . |
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在结构动力冲击响应分析中,通常采用动力放大系数(DAF)简化计算结构的动力响应.但是,目前工程结构中对DAF的取值还存在争议.针对此问题,本文推导了多自由度(MDOF)体系的DAF解析表达式,分析了DAF大于2.0的前提条件;分别通过单自由度(SDOF)体系和MDOF体系算例模型验证了解析表达式的准确性,解释了MDOF体系的DAF大于2.0的原因.基于所提出的DAF解析表达式分析了张弦梁剩余结构在断索冲击作用下的DAF分布规律.分析结果表明:当某一阶模态振型的分量与静力响应值反向时,张弦梁的DAF可能会大于 2.0;即使在有阻尼情况下,张弦梁的DAF也可能会大于2.0.
Keyword ：
动力放大系数 动力放大系数 多自由度体系 多自由度体系 张弦梁 张弦梁 断索冲击 断索冲击
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| GB/T 7714 | 张超 , 周桢干 , 赖志超 et al. 多自由度体系的动力放大系数解析研究 [J]. | 振动工程学报 , 2025 , 38 (3) : 550-557 . |
| MLA | 张超 et al. "多自由度体系的动力放大系数解析研究" . | 振动工程学报 38 . 3 (2025) : 550-557 . |
| APA | 张超 , 周桢干 , 赖志超 , 付馨迪 , 杨晓强 . 多自由度体系的动力放大系数解析研究 . | 振动工程学报 , 2025 , 38 (3) , 550-557 . |
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Replaceable coupling beams (RCBs) have gained great attentions in enhancing seismic performances of coupled shear wall (CSW) structures, showing superior advantages over the conventional reinforced concrete (RC) coupling beams. Recently, the authors proposed using the lead viscoelastic damper as a replaceable fuse to fabricate a new RCB, i.e., the lead viscoelastic coupling beam (LVCB). The hysteretic behaviors of this fuse were experimentally and numerically investigated, but the performance of using LVCB in controlling the seismic response of CSW structure has not been studied yet. This paper therefore studies the seismic enhancement of CSW structure with LVCB. Finite element models of CSWs with LVCB or RC coupling beam are developed and their hysteretic behaviors, energy dissipating capacities and damage modes are investigated by considering different floor configurations. Nonlinear time history analyses are also performed to evaluate the seismic responses of the LVCB enhanced CSW structure. Results show that applying the LVCB to the CSW makes the deformations concentrate in the damper, providing a favorable hysteretic performance with an equivalent damping ratio of about 0.35. The isolated floor reduces about 20 % of the initial stiffness of the CSW structure, but has insignificant effect on the loading capacity, which can improve the damper's deformability and reduce damages of RC components. The seismic response analyses also demonstrate the effectiveness of the LVCB for structural response mitigation, giving the average reduction ratios on story drift, shear force and bending moment are 8.28 %, 11.49 % and 8.22 %, respectively. It is believed that the LVCB is a reliable and practical RCB, showing a wide application prospect in engineering practices. © 2025 Elsevier Ltd
Keyword ：
Floors Floors Seismic response Seismic response Shear walls Shear walls
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| GB/T 7714 | Fang, Xiaojun , Bi, Kaiming , Hao, Hong et al. Seismic performance enhancement of shear wall structures using lead viscoelastic coupling beam [J]. | Engineering Structures , 2025 , 332 . |
| MLA | Fang, Xiaojun et al. "Seismic performance enhancement of shear wall structures using lead viscoelastic coupling beam" . | Engineering Structures 332 (2025) . |
| APA | Fang, Xiaojun , Bi, Kaiming , Hao, Hong , Ding, Hao , Lie, Wenchen , Chen, Zhangyan et al. Seismic performance enhancement of shear wall structures using lead viscoelastic coupling beam . | Engineering Structures , 2025 , 332 . |
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Structures may suffer from accidental impact loads during the service life. While most impacts will not destroy structures completely, quantifying their residual behavior after impact is crucial for evaluating the damage and then providing recommendations for repair or removal. This may greatly reduce the time and economic losses caused by impacts. Hence, this study experimentally and numerically investigated the residual behavior of UHPC-filled high-strength steel tube (UHPC-FHST) members subjected to axial impact. Parameters including impact energy, steel ratio, specimen length, and steel grade (Q690 and Q355) were carefully considered. After tests, different failure modes and axial load-displacement curves were obtained. The residual ratio (β), a ratio of the bearing capacity of a damaged specimen to that of a specimen without impact, was employed to assess the damage level of UHPC-FHST members after axial impact. Tests showed that UHPC-FHST members have excellent axial impact resistance, high residual strength, and high residual ratio, especially under low-energy impact conditions. β decreases rapidly and linearly with increasing nominal strain and then stabilizes after a certain value. A finite element (FE) model was thereafter established and benchmarked by the available test results, where two analysis steps were established to continuously simulate the impact and residual compression processes. The FE results demonstrated a great agreement with the tests, which could provide a reference for further investigations in related studies. © 2024 Elsevier Ltd
Keyword ：
Concretes Concretes High strength steel High strength steel Losses Losses Tubular steel structures Tubular steel structures
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| GB/T 7714 | Yang, Xiaoqiang , Zhang, Zhiqi , Lai, Zhichao et al. Residual behavior of UHPC-filled Q690 high-strength steel tubular members after axial impact [J]. | Engineering Structures , 2024 , 309 . |
| MLA | Yang, Xiaoqiang et al. "Residual behavior of UHPC-filled Q690 high-strength steel tubular members after axial impact" . | Engineering Structures 309 (2024) . |
| APA | Yang, Xiaoqiang , Zhang, Zhiqi , Lai, Zhichao , Chen, Jianqing , Zhang, Chao . Residual behavior of UHPC-filled Q690 high-strength steel tubular members after axial impact . | Engineering Structures , 2024 , 309 . |
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Prestressed corrugated steel-concrete (PCSC) composite girders are often subjected to combined bending and torsion in practice, but the existing theoretical models have mainly focused on pure torsional behavior. Thus, this paper proposed a modified combined action softened truss model (MCA-STM) to predict the flexural-torsional coupling behavior and failure modes of PCSC composite girders. The equivalent loading and nonlinear equations were modified, and the convergence criteria of flexural and torsional failure were established, considering the structural characteristics of PCSC composite girders. A new optimized algorithm was employed to solve the MCA-STM, providing a more efficient and numerically stable solution procedure. A 3D finite element analysis (FEA) model of the PCSC composite girder was established, which was verified by comparing the available test results. A parametric study was carried out based on the verified FEA model to get more datasets with various parameters, and the results were compared to the proposed analytical model. The curves obtained by the FEA and MCA-STM are in good agreement, indicating that the proposed analytical model can predict the full flexural-torsional coupling behavior and failure modes of the PCSC composite girders. © 2024 Elsevier Ltd
Keyword ：
Combined action softened truss model Combined action softened truss model Corrugated steel-concrete composite girders Corrugated steel-concrete composite girders Failure modes Failure modes Flexural-torsional coupling behavior Flexural-torsional coupling behavior Optimized algorithm Optimized algorithm
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| GB/T 7714 | Zhang, H. , Zhao, Q. , Chen, Y. et al. Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders [J]. | Engineering Structures , 2024 , 319 . |
| MLA | Zhang, H. et al. "Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders" . | Engineering Structures 319 (2024) . |
| APA | Zhang, H. , Zhao, Q. , Chen, Y. , Fang, X. , Yang, Z. , Yang, X. . Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders . | Engineering Structures , 2024 , 319 . |
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The torsional effect of prestressed corrugated steel-concrete composite girders (PCSCCG) is more prominent due to its low torsional stiffness, which is therefore crucial to be clarified for safe design. This paper proposed a theoretical model based on the combined actions softened-membrane model (CA-SMM) to predict the torsional response of PCSCCG. The equilibrium, compatibility and constitutive equations were established to consider the characteristics of corrugated steel webs (CSW) and prestressing effect, where a reasonable shear strain assumption was presented to determine the force behavior of concrete slabs and CSW, and the thickness of shear flow in concrete slabs was corrected. An optimized algorithm using the gradient descent method was established to improve the insufficiency and stability. Based on this, a simplified design method was proposed to rapidly evaluate the torque and twist of PCSCCG. Finally, the feasibility of the proposed model and simplified design method was verified by available tests. The superiority of the analytical model in predicting the full torsional performance of PCSCCG was proved, and the reasonability and simplicity of the simplified method in capturing the cracking, yield, and ultimate torques and twists were observed.
Keyword ：
Combined actions softened-membrane model Combined actions softened-membrane model Composite girder Composite girder Corrugated steel webs Corrugated steel webs Optimized algorithm Optimized algorithm Simplified design method Simplified design method
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| GB/T 7714 | Zhang, Hao , Zhao, Qiu , Chen, Yiyan et al. Analytical model and design method of corrugated steel-concrete composite girders under torsion [J]. | STRUCTURES , 2024 , 70 . |
| MLA | Zhang, Hao et al. "Analytical model and design method of corrugated steel-concrete composite girders under torsion" . | STRUCTURES 70 (2024) . |
| APA | Zhang, Hao , Zhao, Qiu , Chen, Yiyan , Fang, Xiaojun , Yang, Zhaohui , Yang, Xiaoqiang . Analytical model and design method of corrugated steel-concrete composite girders under torsion . | STRUCTURES , 2024 , 70 . |
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Impacts have the distinctive characteristics of diverse conditions, low frequency, repeated occurrence, and high hazard; as such, they have emerged as a leading factor in bridge collapses. Ultra-high-performance concrete (UHPC)-filled high-strength steel tubular members are the preferred choice for large-span and high-pier bridges whose vulnerability to impacts cannot be ignored. Nine UHPC-filled high-strength square steel tubular specimens were designed in this study to explore their axial impact resistances and residual bearing capacities using a drop hammer and a hydraulic testing machine, respectively. The influence of impact energy and UHPC steel fiber content on key performance indicators including impact force, deformation, energy absorption, residual capacity, and residual rate were subsequently evaluated. The results show that the impact resistance and residual capacity of a UHPC-filled high-strength steel tubular member are significantly higher than those of a high-strength concrete-filled high-strength steel tubular member and that UHPC members can withstand greater levels of axial impact energy. Furthermore, the strong bonding behavior between the steel fibers and concrete matrix, as well as the resulting fiber network skeleton, can effectively improve the strength, crack resistance, ductility, and energy dissipation capacity of UHPC. Indeed, the incorporation of steel fibers significantly reduces the peak displacement and residual deformation of components subjected to axial impact by up to 14. 3% and 31. 4%, respectively, and an increase in steel fiber volume content from 0% to 2% increases the energy absorption per unit deformation by 38. 4%. In addition, when a specimen does not suffer severe damage from the axial impact, its residual bearing capacity and residual rate increase significantly by up to 28. 3 % and 12. 4 %, respectively. Therefore, an appropriate increase in fiber content (up to 2 %) can improve the axial impact resistance and residual bearing capacity of a UHPC-filled high-strength square steel tubular member. However, the steel fiber contents considered in this study align with conventional engineering practice, and a more comprehensive assessment and analysis should be conducted for scenarios beyond this scope. © 2024 Chang'an University. All rights reserved.
Keyword ：
Bearing capacity Bearing capacity Benchmarking Benchmarking Energy absorption Energy absorption Energy dissipation Energy dissipation High performance concrete High performance concrete High strength steel High strength steel Steel fibers Steel fibers Steel testing Steel testing Tubular steel structures Tubular steel structures
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| GB/T 7714 | Yang, Xiao-Qiang , Zhang, Qiang , Lai, Zhi-Chao et al. Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members [J]. | China Journal of Highway and Transport , 2024 , 37 (5) : 234-245 . |
| MLA | Yang, Xiao-Qiang et al. "Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members" . | China Journal of Highway and Transport 37 . 5 (2024) : 234-245 . |
| APA | Yang, Xiao-Qiang , Zhang, Qiang , Lai, Zhi-Chao , Chen, Jian-Qing , Ma, Wen-Shuo . Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members . | China Journal of Highway and Transport , 2024 , 37 (5) , 234-245 . |
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Abstract ：
Prestressed corrugated steel-concrete (PCSC) composite girders are often subjected to combined bending and torsion in practice, but the existing theoretical models have mainly focused on pure torsional behavior. Thus, this paper proposed a modified combined action softened truss model (MCA-STM) to predict the flexural-torsional coupling behavior and failure modes of PCSC composite girders. The equivalent loading and nonlinear equations were modified, and the convergence criteria of flexural and torsional failure were established, considering the structural characteristics of PCSC composite girders. A new optimized algorithm was employed to solve the MCA-STM, providing a more efficient and numerically stable solution procedure. A 3D finite element analysis (FEA) model of the PCSC composite girder was established, which was verified by comparing the available test results. A parametric study was carried out based on the verified FEA model to get more datasets with various parameters, and the results were compared to the proposed analytical model. The curves obtained by the FEA and MCA-STM are in good agreement, indicating that the proposed analytical model can predict the full flexuraltorsional coupling behavior and failure modes of the PCSC composite girders.
Keyword ：
Combined action softened truss model Combined action softened truss model Corrugated steel-concrete composite girders Corrugated steel-concrete composite girders Failure modes Failure modes Flexural-torsional coupling behavior Flexural-torsional coupling behavior Optimized algorithm Optimized algorithm
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| GB/T 7714 | Zhang, Hao , Zhao, Qiu , Chen, Yiyan et al. Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders [J]. | ENGINEERING STRUCTURES , 2024 , 319 . |
| MLA | Zhang, Hao et al. "Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders" . | ENGINEERING STRUCTURES 319 (2024) . |
| APA | Zhang, Hao , Zhao, Qiu , Chen, Yiyan , Fang, Xiaojun , Yang, Zhaohui , Yang, Xiaoqiang . Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders . | ENGINEERING STRUCTURES , 2024 , 319 . |
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为了研究高强双钢板-UHPC组合剪力墙的轴压性能，进行了8片组合剪力墙的轴向受压试验，试验参数包括截面稳定系数、钢板厚度、钢板屈服强度和混凝土类型。试验结果表明：钢板的破坏形态受截面稳定系数的影响可分为弹性屈曲破坏和塑性屈曲破坏两种类型；截面稳定系数从0.6增加到1.2时，组合剪力墙的承载力下降了33.6%;钢板厚度从3 mm增加到5 mm时，组合剪力墙的承载力增加了16.7%;屈曲参数k取0.8时，采用欧拉公式可以很好地预测钢板的临界屈曲应变。最后，对比了中国GB/T 51340—2018《核电站钢板混凝土结构技术标准》和美国AISC 360-22对组合剪力墙承载力的计算结果，发现美国AISC 360-22可以较好地估算高强双钢板-UHPC组合剪力墙的轴压承载力。
Keyword ：
组合剪力墙 组合剪力墙 超高性能混凝土 超高性能混凝土 轴压承载力 轴压承载力 静力试验 静力试验 高强钢 高强钢
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| GB/T 7714 | 姚鹏宇 , 赖志超 , 杨晓强 . 高强双钢板-UHPC组合剪力墙轴压性能试验研究 [J]. | 建筑结构学报 , 2024 , 45 (S1) : 228-235 . |
| MLA | 姚鹏宇 et al. "高强双钢板-UHPC组合剪力墙轴压性能试验研究" . | 建筑结构学报 45 . S1 (2024) : 228-235 . |
| APA | 姚鹏宇 , 赖志超 , 杨晓强 . 高强双钢板-UHPC组合剪力墙轴压性能试验研究 . | 建筑结构学报 , 2024 , 45 (S1) , 228-235 . |
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